Cloud computing gateway, cloud computing hypervisor, and methods for implementing same

ABSTRACT

Embodiments of the present invention provide a cloud gateway system, a cloud hypervisor system, and methods for implementing same. The cloud gateway system extends the security, manageability, and quality of service membrane of a corporate enterprise network into cloud infrastructure provider networks, enabling cloud infrastructure to be interfaced as if it were on the enterprise network. The cloud hypervisor system provides an interface to cloud infrastructure provider management systems and infrastructure instances that enables existing enterprise systems management tools to manage cloud infrastructure substantially the same as they manage local virtual machines via common server hypervisor APIs.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No. 13/947,133, filed on Jul. 22, 2013 and entitled “CLOUD COMPUTING GATEWAY, CLOUD COMPUTING HYPERVISOR, AND METHODS FOR IMPLEMENTING SAME”, which is a continuation of U.S. patent application Ser. No. 12/488,424, filed on Jun. 19, 2009 now issued as U.S. Pat. No. 8,514,868 and entitled “CLOUD COMPUTING GATEWAY, CLOUD COMPUTING HYPERVISOR, AND METHODS FOR IMPLEMENTING SAME”, which claims the benefit of U.S. Provisional Application No. 61/074,027, filed on Jun. 19, 2008 and entitled “CLOUD COMPUTING GATEWAY AND CLOUD COMPUTING HYPERVISOR” All of which are incorporated in their entireties herein by reference.

BACKGROUND

Field of the Invention

The present invention pertains generally to the field of cloud computing. More particularly, the invention pertains to systems and methods for managing cloud infrastructure and communicating with cloud provisioning and management tools.

Technical Background

Companies have begun offering businesses a new cloud computing outsourcing option that promises reduced costs, improved availability, improved scalability, and reduced time to deploy new applications. These companies act as managed service providers that rent virtual computer, storage, and Internet connectivity services for variable periods on a pay-per-use basis from large pools of repurposable, multi-tenant computing resources. Such cloud infrastructure providers include Amazon Web Services, Joyent, and Mosso.

Many businesses, however, are currently unable to use cloud infrastructure because of a lack of security, control, and manageability of the computing capacity rented from the cloud infrastructure providers. These problems prevent such businesses from maximizing their use of cloud infrastructure, which includes virtual server instances, storage, and Internet bandwidth. In particular, many enterprise IP networks deploy a protective control layer or “enterprise network membrane” to repel external threats, detect intrusions, authorize access, govern and audit activity, and ensure manageability. Unless the business has an administrator or other agent working with the cloud infrastructure provider, the enterprise network membrane does not extend to the cloud infrastructure.

It thus should be appreciated from the foregoing description that there is a need for an improved system and method for managing cloud infrastructure and communicating with cloud provisioning and management tools that addresses the difficulties described above. The present invention satisfies this need and provides further related advantages.

SUMMARY OF THE INVENTION

In accordance with an embodiment, the present invention provides a cloud gateway system, a cloud hypervisor system, and methods for implementing same. The cloud gateway system extends the security, manageability, and quality of service (“QoS”) membrane of a corporate enterprise network into cloud infrastructure provider networks, enabling cloud infrastructure to be interfaced as if it were on the enterprise network. The cloud hypervisor system provides an interface to cloud infrastructure provider management systems and infrastructure instances that enables existing enterprise systems management tools to manage cloud infrastructure substantially the same as they manage local virtual machines via common server hypervisor APIs (application programming interfaces).

Thus, an embodiment of the invention provides a technology that enables cloud infrastructure to be addressable by users and administrators of on-premises software systems and systems management systems, as though the cloud infrastructure were resident in private enterprise datacenters on the business' private enterprise networks. The technology allows businesses to take advantage of commercial cloud infrastructure without unduly sacrificing security, control, and manageability, and without an administrator or other agent to work with the cloud infrastructure provider.

Other features and advantages of the present invention should become apparent from the following description of the preferred embodiments, taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is a block diagram of a network system, in accordance with an embodiment of the present invention.

FIG. 1B is a block diagram of a network system omitting a cloud hypervisor system, in accordance with an embodiment of the present invention.

FIG. 2 is a block diagram of a computer system, in accordance with an embodiment of the present invention.

FIG. 3 is a block diagram of an enterprise gateway system, in accordance with an embodiment of the present invention.

FIG. 4 is a block diagram of an enterprise gateway database for the enterprise gateway system of FIG. 3, in accordance with an embodiment of the present invention.

FIG. 5 is a block diagram of a remote gateway system, in accordance with an embodiment of the present invention.

FIG. 6 is a block diagram of a remote gateway database for the remote gateway system of FIG. 5, in accordance with an embodiment of the present invention.

FIG. 7 is a block diagram of a client access agent, in accordance with an embodiment of the present invention.

FIG. 8 is a block diagram of a mobile end-user database for the client access agent of FIG. 7, in accordance with an embodiment of the present invention.

FIG. 9 is a block diagram of a first embodiment of a cloud hypervisor system, in accordance with an embodiment of the present invention.

FIG. 10 is a block diagram of a cloud hypervisor database for the cloud hypervisor system of FIG. 9, in accordance with an embodiment of the present invention.

FIG. 11 is a block diagram showing the interaction between the cloud hypervisor system of FIG. 9 and a cloud gateway system.

FIG. 12 is a block diagram of a second embodiment of a cloud hypervisor system, in accordance with an embodiment of the present invention.

FIG. 13 is a flowchart of a method for managing cloud infrastructure, in accordance with an embodiment of the present invention.

FIG. 14 is a flowchart of a method for communicating with cloud accounts, in accordance with an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

The following description is provided to enable any person skilled in the art to make and use the invention. Various modifications to the embodiments are possible, and the generic principles defined herein may be applied to these and other embodiments and applications without departing from the spirit and scope of the invention. Thus, the invention is not intended to be limited to the embodiments and applications shown, but is to be accorded the widest scope consistent with the principles, features, and teachings disclosed herein.

Network System

Referring now to the drawings, and particularly to FIGS. 1A and 1B, there is shown a block diagram of a network system 100, in accordance with an embodiment of the present invention. The network system 100 comprises an enterprise network 102, at least one cloud provider network 104, and a wide-area public network 106 (such as the Internet) that connects the enterprise network 102 to the cloud provider network 104. One or more mobile end-user devices 108 may optionally be connected via the public network 106 to the cloud provider network 104. Although FIGS. 1A and 1B show only one cloud provider network 104, it will be appreciated that the enterprise network 102 may be connected to a plurality of cloud provider networks.

The enterprise network 102 comprises a plurality of network end-user devices 110, an enterprise gateway appliance 112, and a cloud hypervisor system 114, which will be described in further detail below. The enterprise gateway appliance 112 may be configured as a physical appliance, as installable software, or as a virtual appliance instance, such as an application software stack packaged as a virtual machine (“VM”). Multiple enterprise gateway appliances 112 on the same enterprise network 102 can work together to provide redundancy from single appliance failure, and scalability to manage increased throughput. The cloud hypervisor system 114 may be coupled to a cloud hypervisor database 116. The cloud hypervisor system 114 may optionally be configured as a plug-in to the enterprise gateway appliance 112 or omitted altogether (as shown in FIG. 1B), as the circumstances warrant.

The cloud provider network 104 comprises a plurality of virtual machines 118. The virtual machines 118 are software implementations of a computer that can be deployed by a hypervisor system and execute programs similar to a physical computer. One or more of the virtual machines 118 are configured as remote gateway nodes 120. Multiple remote gateway nodes 120 work together to provide redundancy from single node failure and scalability to support increased throughput. Enterprise gateway appliances 112 in multiple enterprise networks 102, and remote gateway nodes 120 in multiple cloud provider networks 104 can all work together in a mesh to create an overlay virtual private network with associated plug-in network services 126 that spans a plurality of enterprise networks 102 and cloud networks 104 in a secure and redundant manner.

In one embodiment, the enterprise gateway appliance 112 includes hardware, software, and/or firmware generally operative to upload remote gateway software for the remote gateway nodes 120 to the cloud provider network 104, and to install the remote gateway software on one or more virtual machines 118. The enterprise gateway appliance 112 also includes hardware, software, and/or firmware generally operative to establish a secure virtual private network (“VPN”) 122 over the public network 106, connecting the enterprise gateway appliance 112 to the remote gateway nodes 120, and subsequently to the enterprise virtual machines 128. Once the virtual private network 122 has been established, the enterprise gateway appliance 112 functions as the primary ingress and egress point for all network traffic traveling between the enterprise network 102 and the cloud provider network 104. The enterprise gateway appliance 112 may be coupled to an enterprise gateway database 124 capable of storing the remote gateway software for the remote gateway nodes 120. A pluggable network services layer may be provided by the enterprise gateway appliance 112, supporting plug-ins 126 such as virtual private network, network address translation (“NAT”), routing, firewall, load balancing, caching, wide-area network (“WAN”) acceleration, intrusion detection and intrusion prevention services (“IPS”), denial of service detection and remediation, network access control, SSL acceleration, logfile aggregation, and policy-based governance and auditing of user and administrative actions.

In one embodiment, the remote gateway nodes 120 include hardware, software, and/or firmware generally operative to establish secure encrypted connections to open VPN agents on one or more virtual machines 118, thus converting these virtual machines 118 into enterprise virtual machines 128 in the cloud provider network 104. The remote gateway nodes 120 are deployed from the remote gateway software uploaded over the public network 106 from the enterprise gateway appliance 112 and are configured as virtual appliances that run on one or more virtual machines 118 in the cloud provider network 104. Once installed, the remote gateway nodes 120 maintain the virtual private network 122 with the enterprise gateway appliance 112 and the enterprise virtual machines 128 in the cloud provider network 104. The remote gateway nodes 120 thus establish an extended enterprise network membrane 130 around the enterprise virtual machines 128. The remote gateway nodes 120 also host the remote components of plug-in network services 126 that must be local to the cloud infrastructure. Further, the remote gateway nodes 120 may comprise a remote gateway database (see FIG. 6) capable of storing the remote gateway software, configuration, and state, as well as software, configuration, and state for the remote components of the plug-in network services 126.

In one embodiment, the mobile end-user device 108 includes hardware, software, and/or firmware generally operative to establish a secure mobile virtual private network 132 between the mobile end-user device 108 and the remote gateway nodes 120, and to provide other pluggable network services for the mobile end-user device 108. The mobile virtual private network 132 may be established by a client access agent (see FIG. 7) residing on the mobile end-user device 108. The client access agent enables individual users to access limited cloud services through direct communication with the remote gateway nodes 120 over the public network 106, without going through the enterprise gateway appliance 112. The mobile end-user device 108 may be a laptop computer, a desktop computer, a personal digital assistant (“PDA”) such as the BlackBerry Smartphone by Research in Motion, a cellular phone, or any other computing system or device configured to be connected to a public network. The mobile end-user device 108 may be coupled to a mobile end-user database 134 capable of storing software for the pluggable network services.

The enterprise gateway appliance and remote gateway nodes thus function to provide a virtual private network overlay connecting one or more private enterprise networks to one or more cloud provider networks. Because the remote gateway nodes extend the enterprise network membrane around the enterprise virtual machines in the cloud provider networks, the enterprise virtual machines appear and behave as if they were part of the private enterprise networks, without substantial reduction in the security or manageability of the enterprise network. The enterprise gateway appliance and remote gateway nodes provide the necessary services to help in ensuring that the privacy, security, availability, quality of service, and manageability of the enterprise network is extended to the enterprise virtual machines in the cloud provider network.

General Computer

With reference to FIG. 2, there is shown a block diagram of a computer system 200. Each of the mobile end-user devices 108, network end-user devices 110, enterprise gateway appliance 112, cloud hypervisor system 114, and remote gateway nodes 120 may be an instance of the computer system 200. In other embodiments, each of these elements, along with the virtual machines 118 and enterprise virtual machines 128, may be configured as a software implementation running on one or more computer systems 200.

The computer system 200 includes a processor 205, such as an Intel Pentium® microprocessor or a Motorola Power PC® microprocessor, coupled to a communications channel 210. The computer system 200 further includes an input device 215 (such as a keyboard or mouse), an output device 220 (such as a liquid crystal display or a cathode ray tube display), a communication interface 225, a data storage device 230 (such as a magnetic or optical disk), and memory 235 (such as random access memory (RAM)), each coupled to the communications channel 210. The communication interface 225 may be coupled to the enterprise network 102, a cloud provider network 104, and/or the wide-area public network 106. One skilled in the art will recognize that, although the data storage device 230 and memory 235 are shown as different units, the data storage device 230 and memory 235 may be parts of the same unit, distributed units, virtual memory, etc. Further, it will be appreciated that the term “memory” herein is intended to cover all data storage media, whether permanent or temporary.

The data storage device and/or the memory may also store an operating system (not shown), such as Microsoft Windows Vista, Linux, the IBM OS/2 operating system, the MAC OS, or the UNIX operating system. It will be appreciated that embodiments of the present invention may also be implemented on platforms and operating systems other than those mentioned. An embodiment of the present invention may be written using JAVA, C, C++ language, and/or other programming languages, possibly using object oriented programming methodology. The present invention may be built on Ruby on Rails or using Ajax.

One skilled in the art will recognize that the computer system 200 may also include additional components, such as network connections, additional memory, additional processors, local area networks (LANs), and input/output lines for transferring information across a hardware channel, the Internet or an intranet. One skilled in the art will also recognize that the programs and data may be received by and stored in the computer system 200 in alternative ways. For example, a computer-readable storage medium (CRSM) reader 245, such as a magnetic disk drive, hard disk drive, magneto-optical reader, or CPU, may be coupled to the communications channel 210 for reading a computer-readable storage medium (CRSM) 250, such as a magnetic disk, a hard disk, a magneto-optical disk, or RAM. Accordingly, the central server may receive programs and/or data via the CRSM reader.

Enterprise and Remote Gateway Systems

With reference to FIG. 3, there is shown a block diagram of an enterprise gateway system 300, in accordance with an embodiment of the present invention. The enterprise gateway system 300 may be implemented on the enterprise gateway appliance 112. The enterprise gateway system 300 includes a remote software installer 305 and an enterprise network services tool 310. The remote software installer 305 includes hardware, software, and/or firmware generally operative to upload the remote gateway software for the remote gateway nodes 120 to the cloud provider network 104, and to install the remote gateway software on one or more virtual machines 118. The enterprise network services tool 310 includes hardware, software, and/or firmware generally operative to establish the secure and redundant virtual private network 122 with multiple remote gateway nodes 120, multiple enterprise gateways appliances 112, and multiple enterprise virtual machines 128 over the public network 106 and to provide other network services supported by the plug-ins 126.

The enterprise gateway system 300 may be coupled to an enterprise gateway database, such as the enterprise gateway database 400 shown in FIG. 4. The enterprise gateway database 400 comprises a software database 405 that stores the remote gateway software for the remote gateway nodes 120, a plug-ins database 410 that stores software for the plug-ins 126, and a client database 415 that stores enterprise virtual machine client data (such as connection state, routing tables, credentials, and consolidated log files) required to manage the VPN 122 and pluggable network services 126.

With reference to FIG. 5, there is shown a block diagram of a remote gateway system 500, in accordance with an embodiment of the present invention. The remote gateway system 500 may be implemented on the remote gateway nodes 120. The remote gateway system 500 includes a virtual machine connection tool 505 and a remote network services tool 510. The virtual machine connection tool 505 includes hardware, software, and/or firmware generally operative to establish enterprise virtual machines 128 in the cloud provider network 104 and extending the enterprise network membrane around the enterprise virtual machines 128. The remote network services tool 510 includes hardware, software, and/or firmware generally operative to maintain the secure virtual private network 122 from the enterprise gateway appliance 112, over the public network 106, to the enterprise virtual machines 128 in the cloud network provider 104, and to execute the remote components of the plug-in network services 126 that must be local to the cloud infrastructure.

The remote gateway system 500 may be coupled to a remote gateway database, such as the remote gateway database 600 shown in FIG. 6. The remote gateway database 500 may be implemented on the remote gateway nodes 120. The remote gateway database 500 comprises a software database 610 that stores the remote gateway software, a plug-ins database 610 that stores software for the pluggable network services provided by the remote network services tool 510, and a client database 615 that stores enterprise virtual machine 128 client data (such as connection state, routing tables, credentials, and consolidated log files) required to manage the VPN 122 and pluggable network services 126.

With reference to FIG. 7, there is shown a block diagram of a client access agent 700, in accordance with an embodiment of the present invention. The client access agent 700 may be implemented on a mobile end-user device 108. The client access agent 700 includes a mobile network services tool 705. The mobile network services tool 705 includes hardware, software, and/or firmware generally operative to establish the secure mobile virtual private network 132 over the public network 106 and to provide other pluggable network services for the mobile end-user device 108.

The client access agent 700 may be coupled to a mobile end-user database, such as the mobile end-user database 800 shown in FIG. 8. The mobile end-user database 800 comprises a plug-ins database 805 that stores software for the pluggable network services provided by the mobile network services tool 705 and a client database 810 that stores virtual machine client data (such as connection state, routing tables, credentials, and consolidated log files) required to manage the VPN and pluggable network services.

Cloud Hypervisor System

With reference to FIG. 9, there is shown a block diagram of a first embodiment of a cloud hypervisor system 900, in accordance with an embodiment of the present invention. The cloud hypervisor system 900 includes a set of front-end plug-ins 905, a service bus 910, and a set of back-end plug-ins 915.

Each front-end plug-in 905 includes hardware, software, and/or firmware generally operative to establish one or more pseudo-hypervisor instances 920, to expose the pseudo-hypervisor instances 920 to the enterprise network 102, to listen for and receive hypervisor API calls 925 from enterprise systems management tools 930, to translate received hypervisor API calls into intermediate representations 935, and to place the intermediate representations 935 on the service bus 910 as a transaction. For each transaction issued to the service bus 910, a response code will be returned to the pseudo-hyper visor 920 that will be passed back to the calling enterprise systems management tool 930. In general, a server hypervisor is a low-level computer operating system configured to emulate one or more physical systems to create one or more virtual machines, each virtual machine capable of hosting a high-level computer operating system like Microsoft Windows or Linux. A server hypervisor thus functions to enable multiple high-level computer operating systems to share a single physical computer system without interfering with each other. Commercial examples of server hypervisors include VMWare ESX server, Microsoft Hyper-V, and Citrix XenServer. Instances 920 are referred to as pseudo-hypervisor instances because the front-end plug-in 905 is emulating the provisioning and management interfaces of a commercial server hypervisor, effectively tricking the enterprise systems management tools 930 into believing that they are communicating with a common commercial server hypervisor instead of the cloud hypervisor system 900.

In one embodiment, each server hypervisor API supported on the enterprise network 102 has a corresponding front-end plug-in 905. In general, a hypervisor exposes a management API that is used by provisioning and management tools to monitor the virtual machines associated with the hypervisor and to instruct the hypervisor to create, destroy, or change the state of the virtual machines. Thus, in one embodiment, there is one front-end plug-in 905 for each supported server hypervisor API. It will be appreciated that, in other embodiments, only some of the supported server hypervisor APIs will have a corresponding front-end plug-in 905.

Each front-end plug-in 905 thus is configured to expose one or more unique pseudo-hypervisor instances 920 to the enterprise network 102, to translate each received hypervisor API call 925 into an intermediate representation 935, and to place the intermediate representation 935 on the service bus 910 as a transaction. Once the transaction has been executed by the service bus 910, the service bus 910 will return a result code to the pseudo-hypervisor indicating the state of the transaction for response to the calling enterprise systems management tool 930. In one embodiment, each pseudo-hypervisor instance 920 is associated with a single account at a cloud provider. In other embodiments, a pseudo-hypervisor instance 920 may be associated with a plurality of cloud provider accounts, and a cloud provider account may be associated with a plurality of pseudo-hypervisor instances 920.

The set of front-end plug-ins 905 may also comprise a web console 940 that graphically exposes cloud infrastructure management functions and a topology manager 945 that includes infrastructure topology creation and deployment tools. The web console 940 and topology manager 945 plug into the service bus 910, and either issue instructions directly using the intermediate representation 935, or translate their API calls into intermediate representations 935 so that they can interact with any supported cloud infrastructure through the service bus 910 and back-end plug-ins 915.

The service bus 910 includes hardware, software, and/or firmware generally operative to route each intermediate representation 935 from a front-end plug-in 905 to an appropriate back-end plug-in 915. Each intermediate representation 935 is a generic representation that can be understood by any of the back-end plug-ins 915. In one embodiment, a destination parameter is passed with each intermediate representation 935, indicating the cloud provider network account to which the intermediate representation 935 should ultimately be routed. In other embodiments, the destination parameter indicates the route to the back-end plug-in 915 to which the intermediate representation 935 should proximately be routed. Routing the intermediate representation 935 is implemented by the service bus 910 as a transaction through the backend plug-in 915. The service bus 910 is responsible for ensuring the success of the cloud API call 950, and collecting, remediating and reporting any events that occur during the execution of the cloud API call 950. Upon successful or failed completion of the cloud API call 950, the service bus 910 is responsible for generating and routing a response code back to the calling pseudo-hypervisor 920 in an intermediate representation.

Each back-end plug-in 915 includes hardware, software, and/or firmware generally operative to translate an intermediate representation 935 into a cloud API call 950. In one embodiment, each unique supported cloud provider network account (such as the EC2 cloud provider network account 955, the Rackspace cloud provider network account 960, and the Sungard cloud provider network account 965) has a unique API and a corresponding back-end plug-in 915. It will be appreciated that, in other embodiments, each unique supported cloud provider network account might have a plurality of corresponding back-end plug-ins 915, or one back-end plug-in 915 might support a plurality of cloud provider network accounts. It will also be appreciated that one or more back-end plug-ins 915 could be configured to translate an intermediate representation 935 into the API for a local cloud, such as local cloud 970. The back-end plug-in 915 is responsible for executing the transaction specified by the intermediate representation, validating success of the transaction, collecting events from the cloud API, and reporting the final state of the transaction back to the service bus 910.

The cloud hypervisor system thus acts as a proxy between enterprise systems management tools that are instrumented to work with server hypervisor APIs and the APIs provided by cloud provisioning and management tools or cloud infrastructure providers. The cloud hypervisor system functions to generalize the interface to all cloud infrastructure provisioning and management systems and services by emulating the widely supported provisioning and management interfaces of popular server hypervisors, such as Xen, VMWare ESX and Microsoft Hyper-V. In one embodiment, the cloud hypervisor system enables enterprise systems management tools (such as VMWare Virtual Center and Lab Manager, Microsoft SCVMM, Citrix XenCenter, BMC Bladelogic, IBM Tivoli Provisioning Manager, Novell Platespin, VMLogix LabManager, Surgient, and Scalent) to interact with cloud infrastructure management APIs (such as those of Amazon Web Services, Rackspace, IBM Blue Cloud, Google AppEngine, 3tera AppLogic, Sun, VMWare vCloud, Citrix C3, and Eucalyptus). The cloud hypervisor system does this by emulating server hypervisor APIs, making the enterprise systems management tools believe they are communicating with a common server hypervisor, but then translating the server hypervisor API calls into equivalent cloud API calls. The cloud hypervisor system emulates as much of each server hypervisor's API as is required to satisfy the requirements of known enterprise systems management tools. Emulated operations may include, but are not limited to, discover, create, delete, start, stop, suspend, resume, get configuration, set configuration, and get state.

The cloud hypervisor system 900 may be coupled to a cloud hypervisor database, such as the cloud hypervisor database 1000 shown in FIG. 10. The cloud hypervisor database 1000 comprises a front-end plug-in database 1005 that stores software for set of front-end plug-ins 905 and a back-end plug-in database 1010 that stores software for the set of back-end plug-ins 915, as well as execution data such as execution logs, credentials, and execution state.

With reference to FIG. 11, there is shown a block diagram showing the interaction between a cloud hypervisor system 1100 and a cloud gateway system 1175. The elements of the cloud hypervisor system 1100 correspond to the elements of the cloud hypervisor system 900, except that in FIG. 11 the web console 1140 and topology manager 1145 are shown as tools that are distinct from the cloud hypervisor system 1100.

In particular, the cloud hypervisor system 100 includes a set of front-end plug-ins 1105, a service bus 1110, and a set of back-end plug-ins 1115. Each front-end plug-in 1105 includes hardware, software, and/or firmware generally operative to establish a set of pseudo-hypervisor instances 1120, to expose the pseudo-hypervisor instances 1120 to the enterprise network 102, to listen for and receive hypervisor API calls 1125 from enterprise systems management tools 1130, to translate received hypervisor API calls into intermediate representations 1135, and to place the intermediate representations 1135 on the service bus 1110. Each back-end plug-in 1115 includes hardware, software, and/or firmware generally operative to translate an intermediate representation 1135 into a cloud API call 1150. In one embodiment, each unique supported cloud provider network account (such as the EC2 cloud provider network account 1155, the Rackspace cloud provider network account 1160, and the Sungard cloud provider network account 1165) has a unique API and a corresponding back-end plug-in 1115. It will be appreciated that one or more back-end plug-ins 1115 could be configured to translate an intermediate representation 1135 into the API for a local cloud, such as local cloud 1170.

The cloud gateway system 1175 includes an enterprise gateway appliance (such as enterprise gateway appliance 112) and remote gateway nodes (such as remote gateway nodes 120). Thus, the cloud gateway system 1175 includes hardware, software, and/or firmware generally operative to establish a secure virtual private network over a public network, connecting the cloud hypervisor 1100 to each unique supported cloud provider network account. Once the virtual private network has been established, the cloud gateway system 1175 functions as the primary ingress and egress point for all network traffic traveling between the cloud hypervisor 1100 and the cloud provider network accounts and associated enterprise virtual machines 128. The cloud gateway system 1175 extends the enterprise network membrane around the cloud provider network accounts and associated enterprise virtual machines 128, providing a secure, high-quality, well-managed network connection between the cloud hypervisor system 1100 and commercial cloud infrastructure and making the remote infrastructure appear to be located on the enterprise network.

With reference to FIG. 12, there is shown a block diagram of a second embodiment of a cloud hypervisor system 1200, in accordance with an embodiment of the present invention. The cloud hypervisor system 1200 includes a pseudo-hypervisor creation tool 1205, an API call listening tool 1210, a hypervisor API call translation tool 1215, a routing tool 1220, and a cloud API call translation tool 1225.

The pseudo-hypervisor creation tool 1205 includes hardware, software, and/or firmware generally operative to establish one or more pseudo-hypervisor instances (such as pseudo-hypervisor instances 920) and to expose the pseudo-hypervisor instances to the enterprise network 102. The API call listening tool 1210 includes hardware, software, and/or firmware generally operative to listen for and receive hypervisor API calls sent by enterprise systems management tools (such as enterprise systems management tools 930) to the pseudo-hypervisor instances. The hypervisor API call translation tool 1215 includes hardware, software, and/or firmware generally operative to translate received hypervisor API calls into intermediate representations (such as intermediate representations 935) and to transmit the intermediate representations to the routing tool 1220. The routing tool 1220 includes hardware, software, and/or firmware generally operative to route each intermediate representation from the hypervisor API call translation tool 1215 to the cloud API call translation tool 1225. The cloud API call translation tool 1225 includes hardware, software, and/or firmware generally operative to translate an intermediate representation 935 into a cloud API call 950.

Method for Managing Cloud Infrastructure

With reference to FIG. 13, there is shown a flowchart of a method 1300 for managing cloud infrastructure, in accordance with an embodiment of the present invention. The method 1300 starts in step 1305 with the establishment of an enterprise network (such as enterprise network 102). In step 1310, network end-user devices (such as network end-user devices 110) are connected to the enterprise network. In step 1315, an enterprise gateway appliance (such as enterprise gateway appliance 112) is also connected to the enterprise network. In step 1320, network service plug-ins (such as plug-ins 126) are connected to the enterprise gateway appliance.

In step 1325, an account is established with a cloud provider. In step 1330, the enterprise gateway appliance uploads remote gateway software to one or more remote gateway nodes (such as remote gateway nodes 120) in the cloud provider network. In step 1335, the remote gateway nodes establish secure encrypted connections to open VPN agents on one or more virtual machines, thus converting these virtual machines 118 into enterprise virtual machines (such as enterprise virtual machines 128) in the cloud provider network. In step 1340, a secure virtual private network is established between the enterprise gateway appliance, the remote gateway nodes, and the enterprise virtual machines.

In step 1345, it is determined whether there is an end-user device outside the enterprise network. If there are no outside end-user devices, then the method 1300 proceeds to step 1365. If there is an outside end-user device (such as mobile end-user device 108), then a client access agent is enabled on the outside end-user device in step 1350. In step 1355, the outside end-user device is connected to a public network. In step 1360, a secure virtual private network is established between the outside end-user device and the remote gateway nodes.

In step 1365, plug-in network services are started and service specific sessions between the plug-ins connected to the enterprise gateway appliance and the remote gateway notes are established. This step can be repeated for each plug-in. The method 1300 then ends.

Method for Communicating with Cloud Accounts

With reference to FIG. 14, there is shown a flowchart of a method 1400 for communicating with cloud accounts, in accordance with an embodiment of the present invention. The method 1400 starts in step 1405, where a cloud hypervisor system (such as a cloud hypervisor system 900, 110 or 1200) is connected to an enterprise network. In step 1410, a service bus (such as a service bus 910 or 1110) is established in the cloud hypervisor system. In step 1415, hypervisor API emulators (such as front-end plug-ins 905 or 1105) are connected to the service bus. In step 1420, additional front-end plug-ins (such as web console 940 and topology manager 945) are connected to the service bus. In step 1425, back-end plug ins (such as back-end plug-ins 915 or 1115) are connected to the service bus.

In step 1430, the hypervisor API emulators establish one or more pseudo-hypervisor instances (such as pseudo-hypervisor instances 920 or 1120). In step 1435, the pseudo-hypervisor instances are exposed to the enterprise network. In step 1440, a pseudo-hypervisor instance receives a hypervisor API call (such as a hypervisor API call 925 or 1125) from an enterprise systems management tool. In step 1445, the pseudo-hypervisor instance routs the received hypervisor API call to the appropriate hypervisor API emulator. In step 1450, the hypervisor API emulator translates the received hypervisor API call into an intermediate representation (such as intermediate an representation 935 or 1135). In step 1455, the hypervisor API emulator places the intermediate representation on the service bus. In step 1460, the service bus routes the intermediate representation to the appropriate back-end plug-in. In step 1465, the back-end plug-in translates the intermediate representation into a cloud API call (such as a cloud API call 950 or 1150). In step 1470, the cloud API call is routed to an appropriate cloud account. In step 1471, the back-end plug-in verifies success of the cloud API call. In step 1472, the back-end plug-in returns a result code to the service bus in an intermediate representation. In step 1473, the service bus returns the result code to the pseudo-hypervisor. In step 1474, the pseudo-hypervisor translates the intermediate representation result code into a hypervisor specific result code. In step 1475, the hypervisor specific result code is returned to the calling enterprise systems management tool. The method then ends.

The foregoing description of the preferred embodiments of the present invention is by way of example only, and other variations and modifications of the above-described embodiments and methods are possible in light of the foregoing teaching. The various embodiments set forth herein may be implemented utilizing hardware, software, or any desired combination thereof. For that matter, any type of logic may be utilized which is capable of implementing the various functionality set forth herein. Components may be implemented using a programmed general purpose digital computer, using application specific integrated circuits, or using a network of interconnected conventional components and circuits. Connections may be wired, wireless, modem, etc. The embodiments described herein are not intended to be exhaustive or limiting. The present invention is limited only by the following claims. 

What is claimed is:
 1. A computer-implemented method for managing cloud infrastructure, the method comprising: establishing an enterprise network, wherein one or more network end-user devices are connected to the enterprise network; connecting an enterprise gateway appliance to the enterprise network; establishing a secure virtual private network between the enterprise gateway appliance and at least a first enterprise virtual machine in a cloud provider network, wherein the establishing further comprises: establishing a connection between the enterprise gateway appliance and at least one remote gateway node in the cloud provider network, wherein the secure virtual private network is established between the enterprise gateway appliance, the remote gateway node, and the first enterprise virtual machine; and causing one or more network service plug-ins to execute in the cloud provider network.
 2. The computer-implemented method of claim 1, wherein the enterprise gateway appliance provides remote gateway software to the remote gateway node.
 3. The computer-implemented method of claim 1, wherein the remote gateway node establishes a secure encrypted connection to at least the first enterprise virtual machine.
 4. The computer-implemented method of claim 3, wherein the remote gateway node causes a virtual private network agent to execute on at least the first enterprise virtual machine.
 5. The computer-implemented method of claim 1, wherein one or more corresponding network service plug-ins are also connected to the enterprise gateway appliance.
 6. The computer-implemented method of claim 5, wherein the network service plug-ins provide intrusion detection services and intrusion prevention services.
 7. The computer-implemented method of claim 6, wherein establishing the secure virtual private network further comprises: enabling a client access agent on the end-user device; and connecting the end-user device to a public network.
 8. The computer-implemented method of claim 1, the method further comprising: determining that an end-user device is outside the enterprise network and the cloud provider network; and establishing a secure virtual private network between the end-user device and at least the first enterprise virtual machine.
 9. A system comprising: at least one processor; and a memory storing instructions configured to instruct the at least one processor to perform: establishing an enterprise network, wherein one or more network end-user devices are connected to the enterprise network; connecting an enterprise gateway appliance to the enterprise network; establishing a secure virtual private network between the enterprise gateway appliance and at least a first enterprise virtual machine in a cloud provider network, wherein the establishing further causes the system to perform: establishing a connection between the enterprise gateway appliance and at least one remote gateway node in the cloud provider network, wherein the secure virtual private network is established between the enterprise gateway appliance, the remote gateway node, and the first enterprise virtual machine; and causing one or more network service plug-ins to execute in the cloud provider network.
 10. The system of claimer 9, wherein the enterprise gateway appliance provides remote gateway software to the remote gateway node.
 11. The system of claimer 9, wherein the remote gateway node establishes a secure encrypted connection to at least the first enterprise virtual machine.
 12. A non-transitory computer storage medium storing computer-executable instructions that, when executed, cause a computer system to perform a computer-implemented method comprising: establishing an enterprise network, wherein one or more network end-user devices are connected to the enterprise network; connecting an enterprise gateway appliance to the enterprise network; establishing a secure virtual private network between the enterprise gateway appliance and at least a first enterprise virtual machine in a cloud provider network, wherein the establishing further causes the computer system to perform: establishing a connection between the enterprise gateway appliance and at least one remote gateway node in the cloud provider network, wherein the secure virtual private network is established between the enterprise gateway appliance, the remote gateway node, and the first enterprise virtual machine; and causing one or more network service plug-ins to execute in the cloud provider network.
 13. The non-transitory computer storage medium of claim 12, wherein the enterprise gateway appliance provides remote gateway software to the remote gateway node.
 14. The non-transitory computer storage medium of claim 12, wherein the remote gateway node establishes a secure encrypted connection to at least the first enterprise virtual machine. 